The field experiment was conducted in 2004-2006 on a farm in Frankamionka village, near Zamosc. The experiment was located on soil with silty dust grain composition, light acid, with average content of phosphorus and potassium, average content of organic matter (1.9%). The aim of the study was to determined the influence of strip intercropping of maize ( Zea mays L.) with common bean ( Phaseolus vulgaris L.) and spring wheat ( Triticum aestivum L.) on phosphorus and potassium concentration in maize and intake of macroelements with maize yield. The second factor were different methods of weeds regulation (mechanical, mechanical-chemical, chemical). The changes of phosphorus and potassium concentration in dependence of maize row position was also determined. Strip intercropping slightly increased level of phosphorus in corn. The concentrations of phosphorus and potassium in maize differ depending on rows position in strip. In maize from row neighboring with common bean phosphorus concentration was higher than in the next to spring wheat. But potassium concentrations was higher in inner rows. Mechanical method of weed regulation significantly increased concentration and intake of potassium as compared to mechanical-chemical and chemical method.
